• 한국어류학회지
• /
• 제12권4호
• /
• pp.259-263
• /
• 2000

1998년 8월 14일부터 18일 까지 전라남도 신안군 우이군도의 조간대에 서식하는 어류를 채집하였다. 조사기간 동안 채집된 어류는 한국미기록 1종을 포함하여 모두 5목 15과 22속 25종이였다. 이 가운데 망둑어과 Gobiidae 어류가 6종, 청베도라치과 Blenniidae 어류가 3종이었고, 출현 빈도가 가장 높은 어종은 망둑어과의 점망둑 Chasmichthys dolichognathus, 두줄망둑 Tridentiger trigonocephalus, 풀망둑 Synechogobius hasta 였다. 한편 성촌(St. 2)에서 채집된 1개체는 Pomacentridae (자리돔과)의 자리돔속에 포함되는 Abudefduf bengalensis로 동정되었고, 이 종은 몸에 검은 가로줄무늬를 가진 특징으로 "흑줄돔"으로 명명하고자 한다.

• 한국수산과학회지
• /
• 제30권6호
• /
• pp.1021-1032
• /
• 1997

Satellite-tracked drifters deployed in the East Sea since 1991 are used to study the Tsushima Current (TC). It is found that the TC is a steady current with a mean speed of 10 cm/s before it enters the East Sea. Only during the summer, the TC flows along Honshu Island with a mean speed of $30\~40\;cm/s$ and then exits through the Tsugaru Strait. In fall and winter, the TC does not follow the coast along Honshu Island but it enters into the interior of the East Sea before it reaches the Tsugaru Strait. The water that passes the West Channel of the Korea Strait mostly comes from the western East China Sea and spreads into the interior of the East Sea. It also forms the large eddies in the southern East Sea. The outflow through the Tsugaru Strait comes from the interior of the East Sea in all seasons except summer. The mean speed of the Tsugaru Strait outflow is about 60 cm/s. The largest current variability is found in the eastern central area of the East Sea, south of sub-polar front.

• 산업기술연구
• /
• 제25권A호
• /
• pp.57-65
• /
• 2005

In this paper, for the highly plastic marine soft clay distributed in west and southern coast of Korean peninsula of Kwangyang and Busan New Port areas, correlation between compression index and other indices representing geotechnical engineering properties such as liquid limit, void ratio and natural water content were analyzed. Appropriate empirical equations of being able to estimate the compressibility of clays in the specific areas were proposed and compared with other existing empirical ones. For analyses of the data and test results, data for marine clays were used from areas of the South Container Port of the Busan New Port, East Breakwater, Passenger Quay, Jungma Reclamation and Reclamation Containment in the 3rd stage in Kwangyang. In order to find the best regression model by using the commercially available software, MS EXCEL 2000, results obtained from the simple linear regression analysis, using the values of liquid limit, initial void ratio and natural water content as independent variables, were compared with the existing empirical equations. Multiple linear regression was also performed to find the best fit regression curves for compression index and other soil properties by combining those independent variables. On the other hands, another software of SPSS for non-linear regression was used to analyze the correlations between compression index and other soil properties.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제8권4호
• /
• pp.312-319
• /
• 2016

Measured wave data covering two years simultaneously at 3 locations along the eastern Arabian Sea reveals the presence of long-period (peak wave period > 18 s) low-amplitude waves (significant wave height < 1 m) and the characteristics of these waves are described in this article. In a year, 1.4-3.6% of the time, the low-amplitude long-period swells were observed, and these waves were mainly during the nonmonsoon period. The wave spectra during these long-period swells were multi-peaked with peak wave period around 18.2 s, the secondary peak period around 13.3 s and the wind-sea peak period at 5 s. The ratio of the spectral energy of the wind-sea peak and the primary peak (swell) was slightly higher at the northern location (0.2) than that at the southern location (0.15) due to the higher wind speed present at the northern location.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.1255-1257
• /
• 2003

This study proposes a single-channel satellite remote sensing algorithm for retrieving aerosol optical thickness over global ocean using FY-1C/1D data. An efficient lookup table (LUT)method is adopted in this algorithm to generate apparent reflectance in channel 1 and channel 2 of FY-1C/1D over ocean. The algorithm scale the apparent reflectance in cloud-free conditions to aerosol optical thickness using a state-of-art radiative transfer model 6S with input of the relative spectral response of channel 1 and 2 of FY-1C/1D. Monthly mean composite maps of the aerosol optical thickness have been obtained from FY-1C/1D global area coverage data between 2001 and 2003. Aerosol optical thickness maps can show the major aerosol source which are located off the west coast of northern and southern Africa, Arabian Sea and India Ocean. These result is very similar to other satellite sensors such as AVHRR and MODIS in the location area of heavy aerosol optical thickness over global ocean. The algorithm have been used to FY-1D operational performance and it is the first operational aerosol remote sensing product in China.

• 한국습지학회지
• /
• 제7권2호
• /
• pp.89-104
• /
• 2005

우리나라 서 남해안에 위치한 59개 갯벌의 다모류 출현 양상을 바탕으로 갯벌의 생태등급을 평가하였다. 갯벌의 생태등급 평가는 다모류의 분포밀도, 다양성, 풍부성, 자원적 가치, 종 위험도 등의 생물학적인 자료와 해안선의 자연성, 훼손 가능성, 지형경관 등의 인문지리학적인 면을 평가기준으로 하였다. 조사지역에서 출현한 다모류는 총 14목 37과 181종이었으며, 각 조사지역의 생태등급은 다음과 같다. I 등급 4개 지역(충남 학암포, 전남 우이도와 거문도, 경남 비진도와 매물도), II 등급 30개 지역, III 등급 19개 지역, IV 등급 4개 지역이었다. 이번 조사 결과 생태등급 기준에 대한 보다 면밀한 검토가 필요할 것으로 생각되며, 선정된 각 해역의 생태등급에 따른 정기적인 생물 조사 및 생태계 위협요인의 제거와 같은 실질적인 관리 방안을 마련하여야 할 것으로 판단된다. 특히 생물상 및 자연성이 높은 생태등급 지역의 경우 보다 적극적인 보전 노력이 요구된다.

• 한국수산과학회지
• /
• 제7권4호
• /
• pp.215-220
• /
• 1974

한국산 까나리의 성장. 산란기와 성비등의 생태에 관한 조사 결과는 다음과 같다. 1. 주문진 부근의 까나리의 주산란기는 11월 하순$\~$12월 하순경이다. 2. 백령도와 거제도의 까나리의 산란기와 산란 여부는 분명하지 않다. 3. 주문진 부근의 산란군의 성비 (수컷/암컷)는 산란전반기에는 0.75로 암컷이 우세하고, 산란 후반기에는 1.36으로 수컷이 우세하다. 4. 까나리의 전장과 체중의 상대 성장 곡선은, 백령도산은 $W=0.0001906L^{3.1998319}$이고, 거제도산은, $W=0.0003419L^{3.0213438}$이다. 주문진산은, $W=0.0002655L^{3.1408629}$이다.

• 자원환경지질
• /
• 제18권1호
• /
• pp.23-39
• /
• 1985

The northeastern part of Ogcheon zone which consisted mainly of Cambro-Ordovician arenaceous, argillaceous and calcareous formations and Carboni-Triassic arenaceous and argillaceous formations is delineated as the eastern mass of a thrust fault along Choongju-Moongyong-Cheongsan in the middle of the zone. The present study proposes a geotectonic line, Imgye-Samchog fault(see, figure 1) which divides the northeastern part into two blocks, Hambacksan block in the west and East coast block in the east. The igneous rocks in the Hambacksan block ranging from granite to gabbro are distributed in a symmetrical zones parallel to general direction of Ogcheon zone as follows (Fig. 2 and Table 2). Southeast igneous rock zone: it aligns Jurassic granites in its south and Precambrian leucocratic granites in its north. Central igneous rock zone: it aligns Cretaceous granites in its south and Jurassic granites, and some of diorite and gabbro in its north. Northwest igneous rock zone: aligns Jurassic granites in its south and huge batholithic granodiorite in its north. The distribution of the igneous rocks in the East coast block shows an entirely different features from those of Hanbacksan block. In the southern part of the block they assemble in a narrow area ranging in age from Early Proterozoic, through Middle to Late Proterozoic, Devonian, Jurassic, Cretaceous to Tertiary, whereas, the igneous rocks in the northern part of the block gathered to a restricted area, in ages of Middle Proterozoic and Cretaceous. The assemblage of the igneous rocks in the studied area shows a compositionally restricted, mixed S-type and I-type granites, $^{87}Sr/^{86}Sr$ > 0.706, rare volcanics and shortening with upright folding. These lithologic and structural features suggest that the igneous activity in this part related intimately to Hercynotype Orogeny of Pitcher(1979). Chronological episodes of igneous activity from Early Proterozoic to Early Tertiary in the northeastern part are figured.

• 한국산림과학회지
• /
• 제89권3호
• /
• pp.306-309
• /
• 2000

우리나라 해안지역에 널리 분포하고 있는 해송에 극심한 피해를 주고 있는 솔껍질깍지벌레는 1963년 전남 고흥에서 최초로 발생된 것으로 추정되며, 그 후 계속 확산되어 현재 서해안과 남해안 지역으로 분포가 확대되었다. 본 연구는 1983년부터 1999년까지 임업연구원에서 수행한 발생선단지 조사 자료를 토대로 확산방향을 최초 발생지로부터 서해안쪽으로의 북향, 내륙지역으로의 동북향, 남해안쪽으로의 동향 등 3방향으로 구분하여 확산 유형을 분석하였다. 내륙으로의 확산은 해송의 밀도가 높은 곳에서는 연평균 약 4.3km의 확산속도를 보였지만 1990년대 초반부터 해송의 밀도가 낮아지는 곳에서는 속도가 매우 느려졌다. 해송의 밀도가 높은 서해안쪽 북향과 남해안쪽 동향은 확산속도가 각각 연평균 5.9, 3.3km로서 북향으로의 확산속도가 가장 높았다.

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2012년도 학술발표회
• /
• pp.20-25
• /
• 2012

New Zealand suffers from regular floods, these being the most common source of insurance claims for damage from natural hazard events in the country. This paper describes the origin and distribution of the largest floods in New Zealand, and describes the systems used to monitor and predict floods. In New Zealand, broad-scale heavy rainfall (and flooding), is the result of warm moist air flowing out from the tropics into the mid-latitudes. There is no monsoon in New Zealand. The terrain has a substantial influence on the distribution of rainfall, with the largest annual totals occurring near the South Island's Southern Alps, the highest mountains in the country. The orographic effect here is extreme, with 3km of elevation gained over a 20km distance from the coast. Across New Zealand, short duration high intensity rainfall from thunderstorms also causes flooding in urban areas and small catchments. Forecasts of severe weather are provided by the New Zealand MetService, a Government owned company. MetService uses global weather models and a number of limited-area weather models to provide warnings and data streams of predicted rainfall to local Councils. Flood monitoring, prediction and warning are carried out by 16 local Councils. All Councils collect their own rainfall and river flow data, and a variety of prediction methods are utilized. These range from experienced staff making intuitive decisions based on previous effects of heavy rain, to hydrological models linked to outputs from MetService weather prediction models. No operational hydrological models are linked to weather radar in New Zealand. Councils provide warnings to Civil Defence Emergency Management, and also directly to farmers and other occupiers of flood prone areas. Warnings are distributed by email, text message and automated voice systems. A nation-wide hydrological model is also operated by NIWA, a Government-owned research institute. It is linked to a single high resolution weather model which runs on a super computer. The NIWA model does not provide public forecasts. The rivers with the greatest flood flows are shown, and these are ranked in terms of peak specific discharge. It can be seen that of the largest floods occur on the West Coast of the South Island, and the greatest flows per unit area are also found in this location.